Based on the mechanism of plugging channeling -path by polymer gel particle, elastic plugging strength and breakup plugging strength are defined and they are taken as characteristic parameters and evaluating indexes of the plugging character of the gel particles in pores which are swelled when water adsorbing.

Proper quantities of mineral filler and surfactant are added in order to improve plugging strength.

SMA hard-gel sealing agent is made up of host-compound,cross-linking agent and delay agent.

Study on influencing factors for plugging performance of LPS;

Application of innovative superfine cement plugging technology in development of Henan oilfield;

Laboratory Experimental Studies on Optimal Time and Site Selection for Plugging Secondary Channel in Waterflooding Reservoirs;

Application of the Sealing Property of Drilling Fluids in Bore Hole Stabilization;

Fault plane sealing research using 3-D seismic data;

Design of reverse drainage and sealing for concrete face rock fill dam of Jilintai Hydropower Station I;

Echocardiographic evaluation of cardiac hemodynamics and load changes after atrial septal defects occlusion;

Echocardiographic study on changes of cardiac hemodynamics and load after ventricular septal defects occlusion;

Clinical research of patent ductus arteriosus occlusion;